Brake drum



FIG. 1 is a perspective view of the brake drum embodying my new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a left side elevational view, it being understood that the pattern of teeth is repeated uniformly around the circumference of the drum as shown and schematically by solid lines;

FIG. 4 is a front elevational view; and

FIG. 5 is a cross-sectional view taken along the line 5--5 in FIG. 3. 

The ornamental design for a brake drum, as shown and described. 